7. What level of order or rankdngsurement classifies data into mutually exclusiv

Question

7. What level of order or rankdngsurement classifies data into mutually exclusive categories for which can be imposed on the data? A) nominal B) ordinal C) interval D) ratio 8. The measure of central tendency which is most resistant to extreme values is the A) Mean B) Range C) Mode D) Median 9. Find the area under the standard normal distribution curve to the left of z 1.69. A) 0.4545 B) 0.4452 C) 0.9545 D) 0.9452 10. How many possible outcomes would there be if a coin was tossed once and then a die was rolled? A) 2 B) 6 C) 12 D) 36 11. For a normal distribution curve with a mean of 9 and a standard deviation of 3, which of the following ranges of the variable will define an area under the curve corresponding to a probability ofapproximately 34%? A) from 7.5 to 10.5 B) from 6 to 12 C) from 3to 15 D) from 9 to 12 12. If a normally distributed group of test scores have a mean of 70 and a standard deviati of 12, find the percentage of scores that will fall below 50. A) B) C) D) 4.75% 45.25% 6.75% 35.54% is used to reduce bias in a study or experiment. C) Normalization D) Randomizatio 13. The process of A) placebo B) control

Explanation / Answer

7) Nominal

8) B - Range

9) C - 0.9545

10) 2 * 6 = 12
C - 12

11)
mean = 9
sigma = 3

z-value = 0.4399
ME = 0.4399*3 = 1.3197

from 9 - 1.3197 to 9 + 1.3197 i.e.
from 7.5 to 10.5

12)
P(X < 50) = P(z < (50 - 70)/12) = P(z < -1.6667) = 0.04779

A - 4.75%

13)
Randomization

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